Need advice!

Hi, I have a baby chicken who has yet to fully come out of its shell! It's broken a lil hole through but after moving the mother and the other hatched chickens to a smaller more secure coop, the hen has left this egg and another unhatched egg! I think this was a mistake by me! I have a few other clucky hens so I put these 2 eggs under one of the other hens. These other hens aren't sitting on eggs as i took those eggs away daily! I wasn't sure else what to do however the batch before this happened again but we broke the lil chicken free after the mother abandoned it and put it under a heat light etc and it survived but no other hens where clucky at that time. Thoughts?
Ps. Sorry for the poor punctuation and lack of paragraphs lol